To cite package ‘Rega’ in publications use:

  Cervenka I, El Taher A, Ivanek R (2026). _Rega: R Interface to
  European Genome-Phenome Archive_. R package version 1.1.0,
  <https://bioconductor.org/packages/Rega>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Rega: R Interface to European Genome-Phenome Archive},
    author = {Igor Cervenka and Athimed {El Taher} and Robert Ivanek},
    year = {2026},
    note = {R package version 1.1.0},
    url = {https://bioconductor.org/packages/Rega},
  }